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Similar to https://issuetracker.google.com/issues/206873634 which was closed, however has a relatively recent comment suggesting the behaviour is being replicated by others.

Description

Last week we stopped receiving mailbox push notifications on our Pub/Sub topic, this week it has happened again.

Code

The following code is used to set up the watch

        credentials_secret = _secret_manager.get_secret(secret_id=secret_id)
        creds = Credentials.from_authorized_user_info(credentials_secret, SCOPES)
        gmail = build("gmail", "v1", credentials=creds, cache_discovery=False)
        request = {
            "labelIds": ["INBOX"],
            "topicName": f"projects/{PROJECT_ID}/topics/mailbox_push_notifications",
            "labelFilterBehavior": "INCLUDE",
        }
        gmail.users().watch(userId="me", body=request).execute()

Output

Watch request is successful giving the following output:

message: {
expiration: "1718683204047"
historyId: "8848704"
}}

Steps

This watch is refreshed everyday at 5am so there should never be any downtime. However we can see emails coming in, with no corresponding Pub/Sub messages